The tree is rebuilt every frame. For scenes of this scale, quadtree construction is fast enough to rebuild from scratch each frame, though larger simulations may benefit from incremental updates. Each particle queries its neighborhood for potential collisions, typically checking only 5 to 15 candidates instead of all 40. Red highlights indicate colliding pairs.
The biggest shame in Apple’s complete abandonment of designed-in repairability is that its laptops are some of the longest-lasting around. MacBooks are tanks, and Apple is great about supporting old hardware with software and security updates. I have an old 2012 MacBook Air running Linux. I swapped the HDD for an SSD, maxed out the RAM, and dropped in a new battery, and I see no reason it wouldn’t easily keep rolling for another 10 years.
，详情可参考新收录的资料
Ранее российским туристам пришлось ночевать в холле отеля Дубая из-за воздушной атаки Ирана. Соотечественница описала этот опыт фразой «спать в одном помещении с сотней людей сложно».
Here it is in the last version of Pages on MacOS Tahoe, using the design language introduced with Big Sur: